Determining the color match between image data and graphics objects
First Claim
1. A method of color match assessment for electronic documents, said method comprising:
- (a) receiving digital data defining a composite electronic document including a raster image object having an edge and a color graphics object bordering said edge of said raster image object;
(b) processing pixel color values defining said edge of said raster image object to estimate a local color variance of said pixel color values defining said edge;
(c) using said local color variance to determine if said edge can be color matched;
(d) if said edge can be color matched, deriving a match color for said edge.
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Accused Products
Abstract
A system/method of color match assessment for electronic documents includes receiving digital data defining a composite electronic document including a raster image object having an edge and a color graphics object bordering the edge of the raster image object. The pixel color values defining the edge of the raster image object are processed to estimate a local color variance of the pixel color values. The local color variance is used to determine if the edge can be color matched to the bordering color graphics object. If the edge can be color matched, a match color for the edge is derived. The match color is associated with the digital data defining the electronic document so that a downstream object color match system can use the match color as needed, e.g., to adjust the color of the bordering color graphics object to ensure a match with the edge of the raster image object when the electronic document is printed using a xerographic printing process.
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Citations
20 Claims
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1. A method of color match assessment for electronic documents, said method comprising:
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(a) receiving digital data defining a composite electronic document including a raster image object having an edge and a color graphics object bordering said edge of said raster image object;
(b) processing pixel color values defining said edge of said raster image object to estimate a local color variance of said pixel color values defining said edge;
(c) using said local color variance to determine if said edge can be color matched;
(d) if said edge can be color matched, deriving a match color for said edge. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In a xerographic printing apparatus, a method for color match assessment for electronic documents comprises:
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receiving digital data defining a composite electronic document including a raster image object having an edge and a color graphics object bordering the edge of the raster image object;
determining if said edge and said color graphic object can potentially match in color;
if said edge and said color graphic object can potentially match in color, determining a match color for the edge;
saving said edge match color for use by a downstream object color match system to prevent said edge and said color graphics object from being printed in non-matching colors. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. An apparatus for color match assessment for electronic documents, said apparatus comprising:
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means for input of digital data defining a composite electronic document including a raster image object having an edge and a color graphics object bordering said edge of said raster image object;
means for processing pixel color values defining said edge of said raster image object to estimate a local color variance of said pixel color values defining said edge;
means for using said local color variance to determine if said edge can be color matched;
means for deriving a match color for said edge.
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Specification